EP1668275A1 - Elektro-pneumatische schalteinheit - Google Patents
Elektro-pneumatische schalteinheitInfo
- Publication number
- EP1668275A1 EP1668275A1 EP04763647A EP04763647A EP1668275A1 EP 1668275 A1 EP1668275 A1 EP 1668275A1 EP 04763647 A EP04763647 A EP 04763647A EP 04763647 A EP04763647 A EP 04763647A EP 1668275 A1 EP1668275 A1 EP 1668275A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- valve
- electro
- transmission
- shaft
- switching unit
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H61/00—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
- F16H61/26—Generation or transmission of movements for final actuating mechanisms
- F16H61/28—Generation or transmission of movements for final actuating mechanisms with at least one movement of the final actuating mechanism being caused by a non-mechanical force, e.g. power-assisted
- F16H61/30—Hydraulic or pneumatic motors or related fluid control means therefor
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H61/00—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
- F16H61/26—Generation or transmission of movements for final actuating mechanisms
- F16H61/28—Generation or transmission of movements for final actuating mechanisms with at least one movement of the final actuating mechanism being caused by a non-mechanical force, e.g. power-assisted
- F16H61/30—Hydraulic or pneumatic motors or related fluid control means therefor
- F16H2061/301—Hydraulic or pneumatic motors or related fluid control means therefor for power assistance, i.e. servos with follow up action
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H61/00—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
- F16H61/26—Generation or transmission of movements for final actuating mechanisms
- F16H61/28—Generation or transmission of movements for final actuating mechanisms with at least one movement of the final actuating mechanism being caused by a non-mechanical force, e.g. power-assisted
- F16H61/30—Hydraulic or pneumatic motors or related fluid control means therefor
- F16H2061/301—Hydraulic or pneumatic motors or related fluid control means therefor for power assistance, i.e. servos with follow up action
- F16H2061/302—Hydraulic or pneumatic motors or related fluid control means therefor for power assistance, i.e. servos with follow up action with variable force amplification, e.g. force is depending on selected gear or on actuator force (non-linear amplification)
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H61/00—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
- F16H61/70—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing specially adapted for change-speed gearing in group arrangement, i.e. with separate change-speed gear trains arranged in series, e.g. range or overdrive-type gearing arrangements
- F16H61/702—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing specially adapted for change-speed gearing in group arrangement, i.e. with separate change-speed gear trains arranged in series, e.g. range or overdrive-type gearing arrangements using electric or electrohydraulic control means
Definitions
- the present invention relates to an electro-pneumatic switching unit for a motor vehicle transmission, which comprises a servo support device which supports the vehicle driver in manual switching, according to the preamble of claim 1.
- This may be a transmission comprising a main transmission part which can be switched manually by the driver on a manual shift lever, a split group transmission which can be switched pneumatically via valves and a range group transmission which can be switched pneumatically via valves, or a transmission without split group transmission and range group transmission such as a six-speed gearbox.
- Transmissions of larger commercial vehicles are divided into a main transmission part, a split group transmission (GV) and a range group transmission (GP).
- GV split group transmission
- GP range group transmission
- Modern transmissions, especially in commercial vehicles, have a switching device supported by pneumatics, which carries out pneumatic shifting in the split group transmission and in the range group transmission, while the shifting in
- the main transmission part can be carried out manually by the vehicle driver and the force exerted can be supported by the pneumatics.
- electrical and electronic components are increasingly being provided. These components serve, among other purposes, also to prevent shifting in the transmission, which due to other conditions, such as especially too high vehicle speeds in relation to the gear to be shifted are not permitted.
- An electro-pneumatic switching unit with protective measures against impermissible switching is known from DE 100 29 497 AI.
- This electro-pneumatic switching unit for a vehicle transmission has a split group transmission which can be switched pneumatically via valves and a range group transmission which can be switched pneumatically via valves, the shifting of which can be manually selected by the driver using a shift lever, whereby it is provided with a locking device for mechanically preventing the manual shifting of impermissible gear ratios is.
- a locking device for preventing the pneumatic switching of gear ratios of the vehicle transmission which are not permitted and an electronic control device are provided, the valves of the split group transmission and the valves of the range group transmission being electromagnetically actuated pneumatic valves which are arranged in a common housing.
- the first locking device consists of a gas lock cylinder which, in the slow gear ratio of the range group transmission, shifts from a specific shift gate into another specific above a specific output speed of the transmission
- Shift gate prevents the driver from accidentally switching to an impermissible gear ratio if he has forgotten to select the appropriate gear ratio in the range gearbox.
- the second locking device is a group lock, which prevents the range group transmission from shifting to the slow gear ratio above a predetermined vehicle speed, thereby protecting both the synchronization of the range group transmission and the synchronizations of the main transmission part.
- DE 102 17 482 AI describes an electro-pneumatic switching unit in which the supply of supporting compressed air can be determined without much additional effort.
- Such an electro-pneumatic shifting unit for a vehicle transmission comprises a main transmission shifted manually by the vehicle driver on a shift lever, a split group transmission shifted via valves, and a range shift transmission.
- the shifting of the split group transmission can be preselected manually by the vehicle driver using switches on the shift lever.
- a sensor or switch detects a manual actuation of the vehicle clutch by the vehicle driver and passes this signal on to an electronic control device, which then opens the valves.
- the valves take on the additional function of releasing air to the shuttle valve and thus to the servo support device each time the clutch is actuated or each time the clutch separation point is reached, so that the servo force supporting the manual switching force is only permitted when the clutch is disengaged.
- a gas lock cylinder and a group lock are provided in order to avoid incorrect switching.
- the object of the present invention is to design an electro-pneumatic switching unit for a transmission of a motor vehicle, which comprises a servo support device that supports the vehicle driver in manual switching, in such a way that the servo pressure can be set as a function of the shift gate.
- a valve is therefore provided which, depending on the position of the selector shaft, reduces or adjusts the servo pressure via a pressure reducing valve.
- a piston which is pressurized via a valve in the event of attempted incorrect switching operations via a Pawl acts on the selector shaft so that the selector shaft is held in its current selector gate or moved into a permissible selector gate until the permissible shift conditions in the gearbox are reached, provided that the piston rod is passed through the bottom of the gate lock cylinder.
- a valve can be controlled, which in turn switches a control pressure to the piston of a pressure reducing valve, as a result of which various pressure levels up to complete air shut-off can be realized in the servo support device.
- the pressure levels can be determined as a function of the position of the selector shaft or of the selector gate, since the position of the selector shaft and thus the selector gate can be recognized via the pawl and the piston rod of the gas lock cylinder.
- valve directly on the selector shaft in such a way that the valve tappet can be moved as a function of the position of the selector shaft. This can take place, for example, in that the valve is arranged radially on the selector shaft and is actuated by the bevel of the selector shaft as a function of its axial position. It is also possible to arrange the valve axially in front of the selector shaft in such a way that it can be controlled directly depending on its position.
- the invention is explained in more detail below by way of example with reference to the drawing, in which advantageous exemplary embodiments are shown; 1 shows a diagram of a first embodiment of a switching unit according to the present invention;
- Fig. 2 is a schematic of a second embodiment of a switching unit according to the present invention.
- FIG. 3 shows a simplified illustration of a third embodiment in accordance with the present invention.
- 1 and 2 which illustrate the invention with the aid of a switching unit with a lane lock
- 1 denotes a shift lever whose shift pattern corresponds to a "superimposed H".
- the shift lever is a first one
- Switch 20 assigned to the preselection of the split group transmission and a second switch 21 assigned to the range group transmission In the case of a circuit with the circuit diagram mentioned, two gear ratios are assigned in the forward gears to each end position of the shift lever 1, each of which differ by the gear ratio step of the range group transmission. With the switch position “slow” (L) the gear ratios one to four are shifted and the reverse gear and with the switch position “fast” (H) the gears five to eight are shifted. The neutral position of the main transmission part is in the middle between the gear ratios of a shift gate. The vehicle driver must change the range group transmission by means of the first switch 20 on the shift lever 1. The change is carried out as soon as the neutral position is manually inserted in the main transmission part.
- the split group transmission is preselected by the second switch 21 and switched by the actuation of the clutch.
- the clutch pedal 2 interacts with a GV release valve 3 which is inserted into a line which is connected on the one hand to the servo support device 4 and to a GV changeover valve 5 for controlling the GV cylinder 6 and on the other hand to the air reservoir 7 8 denotes the electronic control device, 9 the selector shaft, 10 the aisle lock cylinder, 11 a main shut-off valve, 12 the clutch, 13 a pressure switch, 14 a GP switch valve, 15 a GP cylinder, with 16 a GP release valve and with 17 a gas check valve. Shifting in the GV split group transmission is always possible and only determined by the corresponding position of the responsible switch 20 on the shift lever 1.
- the mechanical gate lock 10 is used.
- a piston which is pressurized in the event of incorrect switching via the gas shut-off valve 17, engages in the selector shaft 9 via a pawl.
- the selector shaft is held in the current shift gate or moved into a shift gate until permissible shift conditions in the transmission are reached.
- the position of the control shaft 9 and 10 is thus via the pawl and the piston rod of the gas lock cylinder 10 so that the shift gate, for example the shift gate 1/2 (5/6), 3/4 (7/8) and reverse gear are recognizable.
- valve 18, 18 ' can thereby be actuated, which in turn switches a control pressure on the piston of a pressure reducing valve 19, whereupon 4 different pressure levels up to the servo air shutoff can be realized in the servo support device ,
- Fig. 3 shows a schematic in simplified representation for the gate-dependent servo pressure for, for example, the three shift gates 1/2, 3/4, 5/6 or the reverse gear R via a 5/3-way valve 18 'in the event that there is no gate lock is provided.
- the valve 3, which is actuated when the clutch pedal 2 is actuated is also shown.
- valve 18 ' is arranged directly on the selector shaft 9 in such a way that the valve tappet can be moved as a function of the position of the selector shaft. This can take place in that the valve 18 'is arranged radially on the selector shaft 9 and is actuated by the bevel of the selector shaft in dependence on its axial position.
- the cylinders 6 and 15 shown in FIGS. 1 and 2 for pneumatic switching of the split group transmission and the range group transmission do not have to be provided in the vehicle at the same time. In principle, it is sufficient to have either a pneumatic circuit for the split group transmission or the range group transmission, or even just the presence of a pneumatic servo support device without a pneumatically switched group transmission.
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Gear-Shifting Mechanisms (AREA)
- Safety Valves (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10339151A DE10339151A1 (de) | 2003-08-26 | 2003-08-26 | Elektro-pneumatische Schalteinheit |
PCT/EP2004/008563 WO2005022007A1 (de) | 2003-08-26 | 2004-07-30 | Elektro-pneumatische schalteinheit |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1668275A1 true EP1668275A1 (de) | 2006-06-14 |
EP1668275B1 EP1668275B1 (de) | 2009-11-11 |
Family
ID=34202029
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP04763647A Expired - Fee Related EP1668275B1 (de) | 2003-08-26 | 2004-07-30 | Getriebe mit elektro-pneumatische schalteinheit |
Country Status (6)
Country | Link |
---|---|
EP (1) | EP1668275B1 (de) |
JP (1) | JP2007503558A (de) |
CN (1) | CN100480554C (de) |
BR (1) | BRPI0413803A (de) |
DE (2) | DE10339151A1 (de) |
WO (1) | WO2005022007A1 (de) |
Families Citing this family (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102005036940A1 (de) * | 2005-08-05 | 2007-02-08 | Daimlerchrysler Ag | Schalteinheit für ein Getriebe eines Kraftfahrzeugs |
DE102006042213A1 (de) * | 2006-09-08 | 2008-03-27 | Zf Friedrichshafen Ag | Schaltvorrichtung für Kraftfahrzeug-Wechselgetriebe |
EP1947372A1 (de) | 2007-01-18 | 2008-07-23 | Kongsberg Automotive AS | Schaltsystem mit Antriebshilfssystem |
EP1975472B1 (de) | 2007-03-26 | 2012-05-16 | Kongsberg Automotive AS | Mechanische Schalt-Servoreduktion |
DE102007032936A1 (de) * | 2007-07-14 | 2009-01-15 | Zf Friedrichshafen Ag | Verfahren und Schaltungsanordnung zum Unterstützen eines Schaltvorgangs bei einem Handschaltgetriebe |
EP2023019A1 (de) * | 2007-08-07 | 2009-02-11 | Hoerbiger Antriebstechnik GmbH | Schaltkraft-Unterstützungsvorrichtung für ein Getriebe |
DE102008001688A1 (de) | 2008-05-09 | 2009-11-12 | Zf Friedrichshafen Ag | Anordnung zum Unterstützen von manuellen Schaltungen |
DE102014000282A1 (de) * | 2014-01-15 | 2015-07-16 | Hoerbiger Automotive Komfortsysteme Gmbh | Pneumatische Schaltkraftunterstützungseinrichtung |
CN108317244B (zh) * | 2017-01-18 | 2020-01-31 | 上海汽车集团股份有限公司 | 双离合自动变速器及其拨叉控制方法、装置 |
DE102018218437A1 (de) * | 2018-10-29 | 2020-04-30 | Zf Friedrichshafen Ag | Servounterstützungseinrichtung, insbesondere für ein Kraftfahrzeuggetriebe |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19900820B4 (de) * | 1998-01-16 | 2013-03-14 | Schaeffler Technologies AG & Co. KG | Servounterstützungsvorrichtung für ein Getriebe |
DE19839854A1 (de) * | 1998-09-02 | 2000-03-09 | Zahnradfabrik Friedrichshafen | Schaltvorrichtung für Kraftfahrzeug-Wechselgetriebe |
DE19931973A1 (de) * | 1999-07-09 | 2001-01-11 | Wabco Gmbh & Co Ohg | Einrichtung zum Steuern einer Stelleinrichtung für ein Getriebe |
DE10029497A1 (de) * | 2000-06-15 | 2002-01-10 | Zahnradfabrik Friedrichshafen | Elektro-pneumatische Schalteinheit |
DE10029527A1 (de) * | 2000-06-15 | 2002-01-10 | Zahnradfabrik Friedrichshafen | Elektro-pneumatische Schalteinheit |
DE10217482A1 (de) * | 2002-04-19 | 2003-11-06 | Zahnradfabrik Friedrichshafen | Elektro-pneumatische Schalteinheit |
DE10251627A1 (de) * | 2002-11-06 | 2004-05-19 | Zf Friedrichshafen Ag | Schalteinheit |
-
2003
- 2003-08-26 DE DE10339151A patent/DE10339151A1/de not_active Withdrawn
-
2004
- 2004-07-30 JP JP2006524253A patent/JP2007503558A/ja not_active Withdrawn
- 2004-07-30 DE DE502004010363T patent/DE502004010363D1/de not_active Expired - Lifetime
- 2004-07-30 CN CN 200480024308 patent/CN100480554C/zh not_active Expired - Fee Related
- 2004-07-30 WO PCT/EP2004/008563 patent/WO2005022007A1/de active Application Filing
- 2004-07-30 EP EP04763647A patent/EP1668275B1/de not_active Expired - Fee Related
- 2004-07-30 BR BRPI0413803-1A patent/BRPI0413803A/pt not_active IP Right Cessation
Non-Patent Citations (1)
Title |
---|
See references of WO2005022007A1 * |
Also Published As
Publication number | Publication date |
---|---|
DE10339151A1 (de) | 2005-03-24 |
JP2007503558A (ja) | 2007-02-22 |
CN1842668A (zh) | 2006-10-04 |
WO2005022007A1 (de) | 2005-03-10 |
DE502004010363D1 (de) | 2009-12-24 |
CN100480554C (zh) | 2009-04-22 |
EP1668275B1 (de) | 2009-11-11 |
BRPI0413803A (pt) | 2006-10-17 |
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